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Finding the Fourth Proportional to 13,555.92, 18,708 and 7,587.96

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Solution

The fourth proportional to 13,555.92, 18,708 and 7,587.96 is: 10,471.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.92 : 18,708 = 7,587.96 : x
  2. Step 2: Convert to fraction form
    13,555.92/18,708 = 7,587.96/x
  3. Step 3: Cross multiply
    13,555.92x = 18,708 × 7,587.96
  4. Step 4: Simplify right side
    13,555.92x = 141,955,555.68
  5. Step 5: Solve for x
    x = 141,955,555.68/13,555.92
  6. Step 6: Final answer
    x = 10,471.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.